Investigating ββ decay with the NEMO-3 and SuperNEMO experiments

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Blot, S.^1

University of Manchester, Oxford Rd, Manchester

M13 9PL, United Kingdom^1

关键词: Active detector;    Background suppression;    Decay mechanisms;    Detector technology;    Double beta decay;    Lepton number;    Majorana particles;    Orders of magnitude;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/6/062006/pdf
DOI  :  10.1088/1742-6596/718/6/062006

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

The NEMO-3 and SuperNEMO experiments search for neutrino less double beta decay (0vββ). Detection of 0vββ decay would provide direct evidence that neutrinos are Majorana particles and lepton number is not conserved. In these experiments, the isotopes of interest are separated from the active detector region, allowing for reconstruction of the full event topology. This aids in background suppression and discrimination between underlying 0vββ decay mechanisms. The NEMO-3 experiment investigated a total of seven 0vββ decay isotopes. The SuperNEMO experiment builds upon the design of NEMO-3. Upgrades to the detector technologies and radiopurity, as well as an increase in isotope mass will allow SuperNEMO to improve 0vββ half-life sensitivities by two orders of magnitude. The latest result from NEMO-3 is summarized, and an overview of the progress in the construction of the SuperNEMO demonstrator module is presented.